EP 1080443 A1 20010307 - IMPROVED DARK FRAME SUBTRACTION
Title (en)
IMPROVED DARK FRAME SUBTRACTION
Title (de)
VERBESSERTE DUNKELBILDSUBTRAKTION
Title (fr)
SOUSTRACTION AMELIOREE D'IMAGE SOMBRE
Publication
Application
Priority
- US 9910699 W 19990514
- US 8669798 A 19980527
Abstract (en)
[origin: WO9962023A1] A method of adjusting a portion of a dark frame (116) in accordance with compensation values related to dark reference pixels of a picture frame to obtain an adjusted dark frame portion, and then subtracting the adjusted dark frame portion from a corresponding picture frame portion. The technique may be used to improve the accuracy of image sensor (617) such as those used in digital cameras or video conferencing cameras by compensating for dark current noise. The technique may be applied to both CMOS image sensor and, in general, to any image sensors requiring dark frame subtraction. The techniques may also be used in conjunction with calibration of image sensors and imaging systems.
IPC 1-7
IPC 8 full level
G06T 1/00 (2006.01); G06T 5/50 (2006.01); H04N 1/407 (2006.01); H04N 5/217 (2006.01); H04N 5/335 (2006.01); H04N 5/361 (2011.01)
CPC (source: EP KR US)
G06T 5/50 (2013.01 - EP US); G06V 10/30 (2022.01 - KR); H04N 25/63 (2023.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
WO 9962023 A1 19991202; AU 3992599 A 19991213; DE 69919351 D1 20040916; DE 69919351 T2 20050901; EP 1080443 A1 20010307; EP 1080443 A4 20010905; EP 1080443 B1 20040811; JP 2002517112 A 20020611; KR 100415681 B1 20040124; KR 20010015925 A 20010226; TW 425816 B 20010311; US 6101287 A 20000808
DOCDB simple family (application)
US 9910699 W 19990514; AU 3992599 A 19990514; DE 69919351 T 19990514; EP 99923073 A 19990514; JP 2000551353 A 19990514; KR 20007013208 A 20001124; TW 88108745 A 19990605; US 8669798 A 19980527